ABSTRACT Neat reactions of chlorosulfonyl isocyanate (CSI) with hydrocarbon alkenes and monofluoroalkenes in the presence of bicarbonate were compared to the maximized reaction conditions in solution. Electron-deficient alkenes react with CSI to give better product yields when reactions were carried out as neat mixtures. Electron-rich alkenes with CSI give good and comparable results when the reactions were run as either neat mixtures or in solution.
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